28727758080 has 720 divisors, whose sum is σ = 122656875264. Its totient is φ = 6277201920.

The previous prime is 28727758049. The next prime is 28727758117. The reversal of 28727758080 is 8085772782.

It is a tau number, because it is divible by the number of its divisors (720).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 16691620 + ... + 16693340.

Almost surely, 2^28727758080 is an apocalyptic number.

28727758080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28727758080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61328437632).

28727758080 is an abundant number, since it is smaller than the sum of its proper divisors (93929117184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28727758080 is a wasteful number, since it uses less digits than its factorization.

28727758080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1784 (or 1761 counting only the distinct ones).

The product of its (nonzero) digits is 3512320, while the sum is 54.

The spelling of 28727758080 in words is "twenty-eight billion, seven hundred twenty-seven million, seven hundred fifty-eight thousand, eighty".